Connect to a WebSocket server, send messages, and inspect real-time responses.
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A normal HTTP request and response is a one-shot exchange that closes the moment the answer comes back, but a WebSocket connection stays open, letting a server push a new message to the client at any moment without the client asking again, a fundamentally different behavior no ordinary API testing tool built around request-then-close can actually exercise. This tool connects to a WebSocket server, sends messages, and inspects real-time responses, built specifically for testing that persistent, bidirectional connection rather than a single request-response cycle.
See moreSee less about the WebSocket Tester
Useful for confirming a WebSocket server actually pushes an update to a connected client without a new request triggering it, testing how a real-time feature behaves over a connection that's expected to stay open, or inspecting messages flowing in both directions on a persistent connection an HTTP tool was never built to hold open.
Connect to a WebSocket server, send messages, and inspect real-time responses. The WebSocket Tester is one of 900+ free developer tools on Toolblip - all open to use without a signup.
How do I use the WebSocket Tester?
Open the WebSocket Tester on this page, paste or upload your input, and the result updates as you type. Use the copy button to grab the output, or adjust options to tune the result. Nothing you enter leaves your browser.
Is the WebSocket Tester free to use?
Yes. The WebSocket Tester is a free online tool on Toolblip - no signup, no account, no hidden usage limits. It runs in your browser and works on desktop and mobile.
Is the WebSocket Tester safe and private?
Yes. The WebSocket Tester processes your data entirely client-side, so nothing you paste is uploaded or stored on any server. It's safe to use with internal snippets, private keys for debugging, or any other sensitive content you'd rather not send to a remote service.
What kind of output does the WebSocket Tester produce?
The WebSocket Tester produces clean, formatted output that you can copy or download with a single click. The output is tailored to the tool's purpose (formatted code, converted data, transformed text, or processed media) and is ready for immediate use in your project or workflow.
Does the WebSocket Tester work on mobile devices?
Yes. The WebSocket Tester is designed to work on any device with a modern browser, including phones and tablets. The interface adapts to smaller screens, and the core functionality (paste input, transform, copy output) works the same way regardless of your device.
Do I need to install anything to use the WebSocket Tester?
No. The WebSocket Tester runs entirely in your browser - no downloads, no accounts, no API keys. Paste your input, get the output, copy it back into your editor.
Can the WebSocket Tester handle large input files or long text?
Yes. The WebSocket Tester processes everything locally in your browser, so the only limit is your device's available memory. There are no arbitrary caps on input size, character count, or processing time that you would typically encounter with server-based tools.
Can I use the WebSocket Tester offline?
Once the page has loaded, the WebSocket Tester continues to work without an internet connection. Bookmark this page and return to it anytime - all logic runs locally.